28000030278 has 32 divisors (see below), whose sum is σ = 61444127232. Its totient is φ = 8435808800.

The previous prime is 28000030249. The next prime is 28000030291. The reversal of 28000030278 is 87203000082.

28000030278 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1214718 + ... + 1237553.

It is an arithmetic number, because the mean of its divisors is an integer number (1920128976).

Almost surely, 2^28000030278 is an apocalyptic number.

28000030278 is an abundant number, since it is smaller than the sum of its proper divisors (33444096954).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28000030278 is a wasteful number, since it uses less digits than its factorization.

28000030278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2452460.

The product of its (nonzero) digits is 5376, while the sum is 30.

The spelling of 28000030278 in words is "twenty-eight billion, thirty thousand, two hundred seventy-eight".